Abstract
Lipase-catalyzed hydrolysis of linseed oil was investigated. Four commercially available microbial lipases of Lipase AY, Lipozyme RMIM, Lipozyme TLIM, and Novozym 435 were used. Among these tested lipases, Lipase AY exhibited the best hydrolysis effeciency to linseed oil. The effect of reaction variables was also evaluated and optimized using response surface methodology. A second-order regression for the Box-Behken design was used to study the effect of five independent variables, such as, temperature, pH, oil-aqueous phase ratio, enzyme load, and reaction time, on the hydrolysis of linseed oil. The optimal conditions were as follows: temperature 33°C, pH 5.80, oil-aqueous phase ratio 0.90 (w/w), enzyme load 1.20% (relative to the weight of total substrates), and reaction time 3.33 h. Under these conditions, the hydrolysis ratio of linseed oil was 93.92±0.54%.
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